Inductor for magnetic pulse pressure shaping of metals

ABSTRACT

An inductor for magnetic pulse pressure shaping of metals comprises a concentrator having a radial slot and an axial opening for placing a part to be shaped therein; recesses made at the concentrator outer surface with a working winding disposed therein; radial openings made in the concentrator body in the plane of said radial slot at both sides of each recess and to the recess depth; and current conducting inserts mounted in said radial openings, said inserts being insulated from the concentrator and bridging said radial slot, and each current conducting insert mounted between the recesses consisting of two current conducting sections insulated from each other to their depth by a lining.

United States Patent 1191 Tikhonovich et al.

[11] 3,823,589 1451 July 16, 1974 INDUCTOR FOR MAGNETIC PULSE PRESSURESHAPING OF METALS [76] Inventors: Alexandr Tikhonovich, ulitsaDheprovskaya, 19, kv. 7, Mezhuev, Kharkov; Lev Timofeevich, poselickPokatilovka, ulitsa Ulyanovskaya, 35, Khimenko, Kharkov; Alfred Lvovich,ulitsa Dzerzhinskaya, 32, kv. 15, Shlyakht, Kharkov,'all of, U.S.S.R. vg

22 Filed: June 1, 1973 211 Appl. No.: 366,213

[52] US. Cl.. 72/56, 336/178 10/1967 Weadock, Jr 72/56 4/1970Schwinghamer et a1 72/56 [57] ABSTRACT An inductor for magnetic pulsepressure shaping of metals comprises a concentrator having a radial slotand an axial opening for placing a part to be shaped therein; recessesmade at the concentrator outer surface with a working winding disposedtherein; radial openings made in the concentrator body in the plane ofsaid radial slot at both sides of each recess and to the recess depth;and current conducting inserts mounted in said radial openings, saidinserts being insulated from the concentrator and bridging said radialslot, and each current conducting insert mounted between the recessesconsisting of two current conducting sections insulated from each otherto their depth by a lining.

2 Claims 3 Drawing Figures PATENTED JUL 1 51914 INDUCTOR FOR MAGNETICPULSE PRESSURE SHAPING OF METALS The present invention relates to theart of shaping metals by pulsed magnetic field pressure, and morespecifically to inductors for magnetic pulse pressure shaping of metals.

Known in the prior art is an inductor for magnetic pulse pressureshaping of metals comprising a concentrator having a radial slot and anaxial opening for placing a part to be shaped therein, and a windingdisposed in recesses made at the outer surface of the concentrator.

The disadvantage of this'prior art inductor resides in that the axialelectrodynamic forces affecting the winding disposed in the recesses arenot balanced at the radial slot zone. This unbalance leads to anearlyfailure of the inductor due to the breakdown of the windingelectrical insulation.

It is an object of the invention to eliminate the aforementioneddisadvantages.

It is another object of the invention to provide for the balance of theaxial electrodynamic forces affecting the winding at the radial slotzone.

These and other objects and purposes are achieved by making radialopenings in the concentrator body in the radial slot plane at both sidesof each recess to the recess depth and mounting current conductinginserts insulated from the concentrator and bridging the radial slot.

Preferably, the insert mounted between the recesses is made of twocurrent conducting sections insulated from each other to their length.

The above solution ensures practically a complete removal of the axialelectrodynamic forces from the winding at the radial slot zone, therebyconsiderably increasing the inductor service life in terms of the numberof production operation before breakdown of the winding electricalinsulation.

The invention will now be explained in greater detail with reference toembodiments thereof which are represented in the accompanying drawings,wherein:

FIG. 1 shows an inductor for magnetic pulse pressure shaping of metals,and an electrical diagram illustrating its connection to a power supplysource;

FIG. 2 is a sectional view taken along llll of FIG. 1 showing aconcentrator with an insert mounted therein;

FIG. 3 is a top view of FIG. 1 showing a concentrator with an insertmounted therein.

The inductor (FIGS. 1 and 2) consists of a concentrator 1 havingrecesses 2 made in its body which are connected with an axial opening 4by radial slot 3. A working winding 5 is laid down in recesses 2. At thelateral surfaces of concentrator 1 between the end faces and endrecesses 2 and between recesses 2 themselves, radial openings 6 are madealong radial slot 3 to the recess depth. Inserts 7 and an interrecessinsert consisting of two current conducting sections 9 and 10 insulatedby a lining 8 are mounted in these radial openings. Each end insert 7and an interrecess insert are insulated from concentrator 1 by aninsulation 11.

Working winding 5 is electrically connected to a capacitor bank 13 wia aswitching means 12.

Upon closing of switching means 12, capacitor bank 13 discharges intoworking winding 5. As a result, high frequency current flows in thecircuit of winding 5, inducing eddy currents in the walls of recesses 2.These eddy currents, via a radial slot 3, are linked at axial opening 4.The current at the axial opening, in its turn, induces eddy currents ina part 14 being shaped, and these currents, interacting with the currentflow at the working opening, provide for the deformation of part 14. Atthe same time, the current flow in working winding 5 induces eddycurrents in end inserts 7 and insert sections 9 and 10 (the directionsof current flows are shown in FIG. 3). In accordance with the law ofelectromagnetic induction, the currents in end inserts 7 and insertsections 9 and 10 are opposite in direction to the current flowing inworking winding 5. Therefore, the total magnetic flux in radial slot 3at the zone of respective recess 2 is reduced, and as a result of this,the electrodynamic interaction of windings 5 disposed in adjacentrecesses is weakened.

We claim:

1. An inductor for magnetic pulse pressure shaping of metals comprising:a concentrator having a radial slot and an axial opening for placing apart to be shaped therein; a working winding disposed in recesses madeat the outer surface of said concentrator; radial openings made in thebody of said concentrator in the plane of said radial slot at both sidesof each of said recesses to the recess depth; current conducting insertsmounted in said radial openings, insulated from said concentrator andbridging said radial slot.

2. An inductor for magnetic pulse pressure shaping of metals as claimedin claim 1, wherein each current conducting insert mounted between saidrecesses consists of two current conducting sections insulated from eachother to their depth by a lining.

Patent No. 598252589 Dated July 7 Inventor(s) Alexandr TikhonovichMezhuev et a1.

It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below:

On the cover sheet the correct addresses of the inventors should read asfollows:

Alexandr I'ikhonovich Mezhuev: ulitsa Dne rovskaya, l9, kv. 7

Kharkov,

Lev Timofeevich Khimenko: poselok Pokatilovka,ulitsa Ulyanovskaya, 35

Kharkov, USSR I Alfred Lvovic'h Shlyakht: uli'tsa Dzerzhinskaya, 52, kv.l5

Kharkov, USSR Signed and sealed this 4th day of March 1.975.

(SEAL) Attest:

- C. MARSHALL DANN RUTH C. MASON Commissioner of Patents AttestingOfficer and Trademarks F ORM PO-105O (10-69) USCOMM'DC 6037G-P69 U.S.GOVERNMENT PRIN'IING OFHCE: 869. 930

Patent No, D d 16,

Inventor) Alexandr Tikhonovich Mezhuev et a1.

It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below:

On the cover sheet the inventor's names should read Alexandr TikhonovichMezhuev Lev Timofeevich Khimenko Alfred Lvovich Shlyakht Signed andsealed this 29th day of October 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner ofPatents FORM PO-IOSO (IO-G9) uscoMM-Dc 60376-P69 U 5 GUVERNMENY PRINTINGOFFICE: 9 9 o UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION vPatent No. 5,823,589 Dated J ly 97 Inventor(s) Alexandr TikhonovichMezhuev et a1.

It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below:

On the cover sheet the correct addresses of the inventors should read asfollows:

Alexandr Tikhonovioh Mezhuevzulitsa Dnegrovskaya, l9, kv. 7

Kharkov, U SR Lev Timofeevioh Khimenko: poselok Pokatilovka,ulitsaUlyanovskaya, 55

Kharkov, USSR Alfred Lvovich Shlyakht: ulitsa Dzerzhinskaya, 32, kv. lKharkov, USSR 7 Signed and sealed this 4th day of March 1975.

(SEAL) Attest:

C. MARSHALL DANN RUTH C. MASON Commissioner. of Patents ArrestingOfficer and Trademarks FORM P0-105O (10-69) USCOMM-DC scam-pas u,s.GOVERNMENY Pmn'rmc orncc; 930 Q UNITED STATES PATENTYJOFFICE CERTIFICATEOF CORRECTION Patent No, D d 16,

Inventoflg) Alexandr Tikhonovich Mezhuev et a1.

It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below:

On the cover sheet the inventor's names should read Alexandr TikhonovichMezhuev Lev Timofeevich Khimenko Alfred Lvovich Shlyakht Signed andsealed this 29th day of October 1974.

(SEAL) Attest:

McCOY M. GIBSONVJR. C. MARSHALL DANN Attesting Officer Commissioner ofPatents FORM PO-105O (10-69) UscoMM-Dc 50375.}:59

u s sovsnnmzm PRINTING OFFICE: 93o

1. An inductor for magnetic pulse pressure shaping of metals comprising:a concentrator having a radial slot and an axial opening for placing apart to be shaped therein; a working winding disposed in recesses madeat the outer surface of said concentrator; radial openings made in thebody of said concentrator in the plane of said radial slot at both sidesof each of said recesses to the recess depth; current conducting insertsmounted in said radial openings, insulated from said concentrator andbridging said radial slot.
 2. An inductor for magnetic pulse pressureshaping of metals as claimed in claim 1, wherein each current conductinginsert mounted between said recesses consists of two current conductingsections insulated from each other to their depth by a lining.